I hope it is a skate and snowboard shop. I noticed you are in Canada, otherwise I'd send you a P3 bit for 2 bucks paypaled. You can get it at a autoparts store or hardware, or maybe even the skate shop that you use. Something buying it bundled with a bunch of other bits as a kit is acutally pretty cheap like $1-$2. But you've probally have already used a P3 at the Chalet, the one chained to the work bench is usually a P3. So it is either the screw lengths , or the orientiation of the disk.

I realized that some of my comments might be off since I initially was comparing your left and right binding not realizing they were different.
Does the binding start with screw in holes 2 and 3 then moves somewhere different to 2 and 2 or even 1 and 2? Does the indication start and 15 then move to 6?